Write the balanced equation for the 'the extraction of copper from copper pyrites by self-reduction.

{C u}_{2} S + 2 {C u}_{2} O \to 6 C u + {S O}_{2}

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2 {C u}_{2} S + 2 {C u}_{2} O \to 8 C u + {S O}_{2}

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{C u}_{2} S + {C u}_{2} O \to 4 C u + {S O}_{2}

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None of these

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Solution

The correct option is A ${C u}_{2} S + 2 {C u}_{2} O \to 6 C u + {S O}_{2}$
Extraction of copper from copper pyrites involves the following steps:
Roasting:
$2 C u F e S_{2} + O_{2} Δ - \to {C u}_{2} S + 2 F e S + {S O}_{2} 2 {C u}_{2} S + 3 O_{2} \to 2 {C u}_{2} S + 3 {S O}_{2} 2 F e S + 3 O_{2} \to 2 F e O + 2 {S O}_{2}$
Smelting:
$F e O + S i O_{2} \to F e S i O_{3} (s l a g) {C u}_{2} O + F e S \to {C u}_{2} S + F e O$
and
$C u_{2} S + 2 C u_{2} O \to 6 C u + S O_{2}$

Suggest Corrections

Similar questions

C u_{2} S + 2 C u_{2} O \to 6 C u + S o_{2}

A : F e O + S i O_{2} \to F e S i O_{3}

B : 2 F e S + 3 O_{2} \to 2 F e O + 2 S O_{2}

C : 2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2}

D : 2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2}

Select reactions actually taking place :

Name the process used for the formation of blister $C u$ by following reaction :(unbalanced reactions)

$2 C u_{2} S + 3 O_{2} \to C u_{2} O + S O_{2}$

C u_{2} O + C u_{2} S \to C u + S O_{2}

2 C u_{2} O + C u_{2} S H e a t - -- \to 6 C u + S O_{2}

I

I I

\begin{matrix} Column I & Column II (A) & Blistered C u & (I) & Aluminium (B) & Blast furnace & (I I) & 2 C u_{2} O + C u_{2} S \to 6 C u + S O_{2} (C) & Reverberatory furnace & (I I I) & Iron (D) & Hall-Heroult process & (I V) & F e O + S i O_{2} \to F e S i O_{3} (V) & 2 C u_{2} S + 3 O_{2} \to 2 C u_{2} O + 2 S O_{2} \end{matrix}

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